____________________________ Supreme Court ruling in 1967 found that there should be a reasonable expectation of privacy in personal conversations.

The Supreme Court ruling in 1967 that established the principle of a reasonable expectation of privacy in personal conversations is Katz v. United States. This landmark decision addressed the issue of wiretapping without a warrant and emphasized that the Fourth Amendment's protection against unreasonable searches and seizures extends to conversations and communications.

In this case, the Court held that privacy should not solely depend on the physical location, but also on a person's subjective expectation of privacy that society recognizes as reasonable. Katz’s activities were deemed private despite occurring in a public phone booth, illustrating that individuals have a reasonable expectation of privacy when they engage in private conversations, even in places that might not be thought of as private per se. This case significantly impacted how privacy rights are viewed in the context of law enforcement and technology, establishing a precedent that continues to influence rulings related to privacy today.